How to call custom methods from CalculationResultView class
问题 We implemented custom calculation view class with custom methods e.g. "getMonthlyDiscount", "getMonthlyPrice", etc. and registered it with component framework to BasketBOCalculationResultViewExtensionFactory. The problem is we are unable to find information of how to call those methods to get calculated results. By calling "basketbo.getExtension(BasketBOCalculationResultViewExtension.class)" we get "BasketBOCalculationResultViewExtensionImpl", so only methods defined in